Semaglutide lowers body weight in rodents via distributed neural pathways

Sanaz Gabery, Casper G Salinas, Sarah J Paulsen, Jonas Ahnfelt-Rønne, Tomas Alanentalo, Arian F Baquero, Stephen T Buckley, Erzsébet Farkas, Csaba Fekete, Klaus S Frederiksen, Hans Christian C Helms, Jacob F Jeppesen, Linu M John, Charles Pyke, Jane Nøhr, Tess T Lu, Joseph Polex-Wolf, Vincent Prevot, Kirsten Raun, Lotte SimonsenGao Sun, Anett Szilvásy-Szabó, Hanni Willenbrock, Anna Secher, Lotte Bjerre Knudsen

Research output: Contribution to journalArticlepeer-review

83 Citations (SciVal)

Abstract

Semaglutide, a glucagon-like peptide 1 (GLP-1) analog, induces weight loss, lowers glucose levels, and reduces cardiovascular risk in patients with diabetes. Mechanistic preclinical studies suggest weight loss is mediated through GLP-1 receptors (GLP-1Rs) in the brain. The findings presented here show that semaglutide modulated food preference, reduced food intake, and caused weight loss without decreasing energy expenditure. Semaglutide directly accessed the brainstem, septal nucleus, and hypothalamus but did not cross the blood-brain barrier; it interacted with the brain through the circumventricular organs and several select sites adjacent to the ventricles. Semaglutide induced central c-Fos activation in 10 brain areas, including hindbrain areas directly targeted by semaglutide, and secondary areas without direct GLP-1R interaction, such as the lateral parabrachial nucleus. Automated analysis of semaglutide access, c-Fos activity, GLP-1R distribution, and brain connectivity revealed that activation may involve meal termination controlled by neurons in the lateral parabrachial nucleus. Transcriptomic analysis of microdissected brain areas from semaglutide-treated rats showed upregulation of prolactin-releasing hormone and tyrosine hydroxylase in the area postrema. We suggest semaglutide lowers body weight by direct interaction with diverse GLP-1R populations and by directly and indirectly affecting the activity of neural pathways involved in food intake, reward, and energy expenditure.

Original languageEnglish
Article numbere133429
JournalJCI Insight
Volume5
Issue number6
DOIs
Publication statusPublished - 2020 Mar 26
Externally publishedYes

Subject classification (UKÄ)

  • Neurosciences

Fingerprint

Dive into the research topics of 'Semaglutide lowers body weight in rodents via distributed neural pathways'. Together they form a unique fingerprint.

Cite this